/**
*      author: Y_Yao
*      created: 2025-02-28 16:50:07
**/

#include<bits/stdc++.h>

#define int LL
using namespace std;
using LL = long long;
const LL LLINF = 1e18;
const int INF = 0x3f3f3f3f;
const int N = 4 + 1;
int a[N];
int n;

void solve()
{
    cin >> n;
    int sum = 0;
    for(int i = 0;i < n;i++)
    {
        cin >> a[i];
        sum += a[i];
    }

    int ans = LLINF;
    for(int i = 0;i < (1 << n);i++)
    {
        int suma = 0;
        for(int j = 0;j < 4;j++)
        {
            if((i >> j) & 1)
            {
                suma += a[j];
            }
        }
        int sumb = sum - suma;
        ans = min(ans,max(suma,sumb));
    }

    cout << ans << endl;
}

signed main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);

    int t = 1;
    //cin >> t;
    while(t--)
    {
        solve();
    }
    return 0;
}